Well it didn't. :) The person replying to your comment was basically saying the organized crime in Chicago is still relevant for civilians, and gave several examples, a direct rebuttal to your statement that "Into the 1970s, organized crime might have had some salience for civilians like us, but I think it's been decades since it mattered."

You'll note that this sentence of yours does not specify "mafia-type organized crime", so when someone replies about the relevance of what you did specify, organized crime, its a pretty clear line. :)